Question: I am coding a claim that includes the following: "secondary diabetes w/ renal manifestations." Do I have enough information to choose a diagnosis code with these notes? -- Michigan Subscriber Answer: You have enough there to choose 249.40 (Secondary diabetes mellitus with renal manifestations; not stated as uncontrolled or unspecified) for the patient's secondary diabetes. To paint a complete diagnosis picture for this patient, however, you also need to code for the associated condition. So let's say that the patient's diabetes was causing Kimmelstiel-Wilson syndrome. You could then report the following: If there is not additional information to explain the diabetic renal disease, code diabetic nephropathy NOS (583.81) as the manifestation.